发明授权
- 专利标题： Focusing position determining apparatus, imaging apparatus and focusing position determining method
- 专利标题（中）： 聚焦位置确定设备，成像设备和聚焦位置确定方法
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申请号： US12548570申请日： 2009-08-27
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公开(公告)号： US08208802B2公开(公告)日： 2012-06-26
- 发明人: Yuki Endo , Toshiyuki Tanaka , Toshihiro Hamamura , Tsuyoshi Moriya , Naoki Takafuji
- 申请人： Yuki Endo , Toshiyuki Tanaka , Toshihiro Hamamura , Tsuyoshi Moriya , Naoki Takafuji
- 申请人地址： KR Suwon-si
- 专利权人： Samsung Electronics Co., Ltd.
- 当前专利权人： Samsung Electronics Co., Ltd.
- 当前专利权人地址： KR Suwon-si
- 代理机构： Drinker Biddle & Reath LLP
- 优先权： JP2008-218609 20080827
- 主分类号： G03B3/00
- IPC分类号： G03B3/00
摘要：
Provided are a focusing position determining apparatus, an imaging apparatus, and a focusing position determining method, the method including setting an aperture to a first aperture value; driving a focus lens through a first range of positions as a first drive; during the first drive, obtaining images periodically, and calculating a first sampling of contrast values from the obtained images; calculating a first focus position from the first sampling of contrast values; setting the aperture to a second aperture value; driving a focus lens through a second range of positions as a second drive, the second range of positions being based on the first focus position; during the second drive, obtaining images periodically, and calculating a second sampling of contrast values from the obtained images; calculating a focusing position from the second sampling of contrast values; and driving the focus lens to the calculated focusing position.
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